Dai_STi

Hey guy's 🤙

Just wondering what you guys have done for a catch tank system, I don't fancy paying 400 odd pound for a tank and hoses lol
I'm going to make my own catch can kit, blank off the two smaller breather hoses on the rocker cover, use just the one big breather outlet on the rocker covers and use a 3 port catch can. I know these engines have negative crank case pressure so will require vacuum from the turbo intake pipe.

Is there anything you guys recommend or am I missing something?


Pic for attention
Thanks 😊

MOTORS S GT

iTrader: (2)

Don't use the large 16mm breathers on the cam covers a they are not baffled internally, they are just a balancing system only, just use the small 12mm ones they are baffled, & use a baffled catch can, otherwise your wasting your time.

Dai_STi

Thanks man, really appreciate this 👍🏻

John 37

Have you considered an air/ oil seperator?
I've fitted one to my road tune 08 STI and it works perfectly. No maintenance or emptying needed. Mine sits on the oil filler so any oil goes back to the sump.

MrRtm

Just buy a cheapish ebay oil catch can and aos and run both, a catch can is a catch can tbh, no need to pay 400 quid for one. Also don't return to sump imo, the oil gets whipped up in the cans and you don't want that mayo like ish in your engine

Dai_STi

This is what I was thinking and yeah I agree with that. To not return the oil back to the sump 👍🏻

MrRtm

I don't know if there's a better setup as it came like this but I have an aos/catch can setup that goes:

Crank Case Breathers > T piece > AOS > Catch Can > Turbo Inlet

My pcv goes into the turbo inlet and is not "caught" but would probably be better if it was

Gambit

iTrader: (6)

I run an aos into catch can and vent




PCV runs direct to aos then head breathers vent into oe hard pipe then into aos. Return for aos goes into catch can and just vents. No return into inlet

Vxr2010

I bought a catch can on ebay for around 14£ delivered , i did buy some stronger pipe but that was not much , i just do a single catch can off the pcv valve to intake pipe , i cut up a new sponge and put in the in the can as a baffle , it works very well , if you wanted it would be very easy to do it off the rocker breathing system but i’ve never needed to , i was getting a slight puff occasionally on start up , i’m on quite a slope so any oil that got into the ic was running over night into the throttle body , but most ebay catch cans are fine and around 20 £ or so , i did think of a dual port one but for me i don’t really felt i needed it , easy to fit too, pipe was 13x20mm

Danjo

IMO you want to run it off both the head vents (these can be tee'd into one) AND the crank case vent on two of the three ports on a three port catch can, and then use the third as the outlet back to the intake.

Vxr2010

the single port catch cans are cheaper so you could buy two and do things that way , or as above use a dual port one and plumb them into that